Affiliation: | a Department of Crop and Soil Sciences, Cornell University, 726 Bradfield Hall, Ithaca, NY 14853, USA b Department of Agronomy and Plant Genetics, University of Minnesota, 411 Borlaug Hall, 1991 Upper Buford Circle, St Paul, MN 55108, USA c Department of Soil, Water and Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, St Paul, MN 55108, USA |